Writing-Machine-Arduino-CNC

This Project is shared with whom is interested to build his own writing machine, the machine is based on Arduino Uno and CNC shield, a full description is included.

DPI Writing Machine

This repository contains the design files, Arduino software, and instructions for building and operating a DPI writing machine. The machine uses a servo-controlled pen plotter mechanism to write precise text or drawings on various surfaces.

Overview

The DPI writing machine is a pen plotter driven by Arduino, capable of creating detailed plots and writing text by controlling servo motors and stepper motors to move the pen across a two-dimensional plane.

Mechanical Design

Components Required:

• Arduino Uno (or similar microcontroller)
• Servo motor (for pen lifting and lowering)
• Stepper motors (x2, for X and Y axis control)
• Stepper motor drivers (A4988 or DRV8825 recommended)
• Linear rails and bearings for smooth axis movement
• Timing belts and pulleys
• Pen holder mechanism
• Frame (3D printed or aluminum extrusion recommended)

Assembly Process:

1. Frame Construction: Assemble the base frame using aluminum extrusion or a rigid structure to ensure stability.
2. Axis Setup: Mount linear rails, bearings, and timing belts for precise motion along X and Y axes.
3. Stepper Motor Installation: Secure stepper motors and connect them via timing belts and pulleys to the moving axis carriages.
4. Servo Pen Mechanism: Attach a servo motor with a pen holder designed to lift and lower the pen as needed during plotting.

Electronics & Wiring

• Connect stepper motors to respective drivers and Arduino pins according to provided wiring diagrams.
• Connect the servo motor for pen control directly to the Arduino PWM pin.
• Ensure proper power supply (12V recommended for motors, 5V for Arduino).

Software

Arduino Code

• The Arduino sketch provided controls the movement of stepper motors and the servo motor for precise writing.
• Movement commands follow standard G-code formatting, facilitating ease of plotting various designs.
• Servo positions:
  • M3 S0: Pen up
  • M3 S90: Pen down (writing position)

Required Software

• Arduino IDE: For uploading and modifying the Arduino sketch.
• Universal G-code Sender (UGS) or similar software: Used for sending G-code commands to the Arduino.

Operating Instructions

1. Upload the provided Arduino sketch to the microcontroller.
2. Generate or prepare your G-code plot file using Inkscape or a similar tool.
3. Connect your machine to a computer and launch UGS or equivalent software.
4. Load your G-code file into the sender application and start plotting.

License

This project is open source and licensed under the MIT License. Contributions and improvements are welcome!